Annual report [Section 13 and 15(d), not S-K Item 405]

Leases - Lease Abandonment and Termination (Details)

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Leases - Lease Abandonment and Termination (Details)
ft² in Thousands, $ in Thousands
 12 Months Ended
Sep. 04, 2024
USD ($)
paymentInstallment
Jun. 28, 2024
USD ($)
ft²
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Restructuring Cost and Reserve [Line Items]          
Lease abandonment/termination gain (loss) [1]     $ (12,205) $ 0 $ 0
Alexandria, VA          
Restructuring Cost and Reserve [Line Items]          
Lease abandonment/termination gain (loss) $ 700        
Reduction in operating lease right-of-use assets 400   6,000    
Operating lease, contract termination, liability $ 12,000   12,000    
Number of installment payments | paymentInstallment 2        
Decrease in operating lease liability $ 1,100        
Alexandria, VA | Other Long-term Liabilities          
Restructuring Cost and Reserve [Line Items]          
Operating lease, contract termination, liability     $ 6,000    
Contract Termination | Vienna, VA          
Restructuring Cost and Reserve [Line Items]          
Net rentable area (in square foot) | ft²   4      
Lease Abandonment | Contract Termination | Alexandria, VA          
Restructuring Cost and Reserve [Line Items]          
Net rentable area (in square foot) | ft²   95      
Lease abandonment/termination gain (loss)   $ (12,900)      
Reduction in operating lease right-of-use assets   6,700      
Exit and disposal costs   3,700      
Lease Abandonment | Contract Termination | Alexandria, VA | Leasehold improvements          
Restructuring Cost and Reserve [Line Items]          
Tangible asset impairment charges   $ 2,500      
[1]
(a) The cash flows related to discontinued operations and held-for-sale assets and liabilities have not been segregated and remain included in the major classes of assets and liabilities. Accordingly, the Consolidated Statements of Cash Flows include the results of continuing and discontinued operations.